<template>
  <div>
    <!--头部面包屑-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片-->
    <el-card>
      <!--添加角色按钮-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="dialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!--渲染角色列表-->
      <el-table :data="rolelist" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <!--添加作用域插槽-->
          <template slot-scope="scope">
            <el-row
              :class="['bottom', 'vcenter']"
              v-for="item1 in scope.row.children"
              :key="item1.id"
            >
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过 for 循环 嵌套渲染二级权限-->
                <el-row
                  :class="['bottom', 'vcenter']"
                  v-for="item2 in item1.children"
                  :key="item2.id"
                >
                  <!--二级权限的渲染-->
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!--三级权限的渲染-->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column prop="" label="操作">
          <template slot-scope="scope">
            <!--编辑按钮-->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <!--删除按钮-->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeUserById(scope.row.id)"
              >删除</el-button
            >
            <!--分配权限按钮-->
            <el-tooltip
              effect="dark"
              content="分配角色"
              placement="top"
              :enterable="false"
            >
              <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!--添加用户  隐藏部分-->
    <el-dialog
      title="添加用户"
      :visible.sync="dialogVisible"
      width="36%"
      @close="addDialogClose"
    >
      <!--添加用户表单-->
      <el-form :model="addForm" ref="addFormRef" label-width="70px">
        <el-form-item label="角色名称">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!--底部区域-->
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole()">确 定</el-button>
      </span>
    </el-dialog>

    <!--修改角色信息  隐藏部分-->
    <el-dialog
      title="修改用户信息"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!--添加用户表单-->
      <el-form :model="editForm" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!--底部区域-->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!--分配权限  隐藏部分-->
    <el-dialog
      title="权限分配"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!--树形控件-->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <!--底部区域-->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //查询全部角色
      rolelist: [],
      //添加角色 是否显示
      dialogVisible: false,
      //添加角色 表单双向绑定
      addForm: {
        roleName: "",
        roleDesc: "",
      },

      //控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的用户信息对象
      editForm: {},

      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightslist: [],

      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },

      //默认选中的系欸但Id值数组
      defKeys: [],
      //当前即将分配权限的角色id
      roleId: ''
    };
  },

  created() {
    //获取所有角色
    this.getRolesList();
  },

  methods: {
    //获取所有角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) return this.$message.error("获取失败！");
      this.rolelist = res.data;
      console.log(this.rolelist);
    },

    //取消关闭  表单内容重置
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },

    //添加角色
    addRole() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (valid) {
          const { data: res } = await this.$http.post("roles", this.addForm);
          console.log(res);
          if (res.meta.status != 201) return this.$message.error(res.meta.msg);
          this.$message.success("创建角色成功！");
          //成功之后隐藏添加对话框
          this.dialogVisible = false;
          //重新获取角色列表
          this.getRolesList();
        }
      });
    },

    //展示编辑角色的对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status != 200) {
        return this.$message.error(res.meta.msg);
      }
      this.editForm = res.data;
      console.log(this.editForm);
      this.editDialogVisible = true;
    },

    //监听修改角色对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },

    //修改角色信息并提交
    editUserInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (valid) {
          const { data: res } = await this.$http.put(
            "roles/" + this.editForm.roleId,
            {
              roleName: this.editForm.roleName,
              roleDesc: this.editForm.roleDesc,
            }
          );
          if (res.meta.status != 200) {
            return this.$message.error("更新角色信息失败！");
          }
          //关闭对话框
          this.editDialogVisible = false;
          //重新查询
          this.getRolesList();
          //提示成功
          return this.$message.success("更新用户信息成功！");
        }
      });
    },

    //根据ID删除对应的角色信息
    async removeUserById(id) {
      //先弹框询问用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      //如果用户确认删除，则返回值为confirm
      //如果用户取消了删除，则返回值为字符串cancel
      //console.log(confirmResult)
      if (confirmResult != "confirm") {
        return this.$message.info("已取消删除！");
      }
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status != 200) return this.$message.error("删除失败！");
      this.$message.success("删除成功！");
      this.getRolesList();
    },

    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //先弹框询问用户是否删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      //如果用户确认删除，则返回值为confirm
      //如果用户取消了删除，则返回值为字符串cancel
      //console.log(confirmResult)
      if (confirmResult != "confirm") {
        return this.$message.info("已取消删除！");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
       if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      // this.getRolesList()
      role.children = res.data
    },
    
    //分配权限的实现 点击分配权限，把该角色的权限都展示出来
    async showSetRightDialog(role) {
      this.roleId = role.id
      const {data: res} = await this.$http.get("rights/tree")
      if(res.meta.status != 200) return res.$message.error(res.meta.mag)
      this.rightslist = res.data
      
      //递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },

    //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
    //如果当前node系欸但不包含children属性，则是三级节点
    if(!node.children){
      return arr.push(node.id)
    }
    node.children.forEach(item => this.getLeafKeys(item, arr))
    },

    //监听权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
      
    },

    //点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

      const idStr = keys.join(',')

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }

      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
},
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 10px;
}

.bottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>>